mirror of https://github.com/prometheus/prometheus
253 lines
6.4 KiB
Go
253 lines
6.4 KiB
Go
// Copyright 2013 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package remote
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
"sync/atomic"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/prometheus/common/model"
|
|
)
|
|
|
|
type TestStorageClient struct {
|
|
receivedSamples map[string]model.Samples
|
|
expectedSamples map[string]model.Samples
|
|
wg sync.WaitGroup
|
|
mtx sync.Mutex
|
|
}
|
|
|
|
func NewTestStorageClient() *TestStorageClient {
|
|
return &TestStorageClient{
|
|
receivedSamples: map[string]model.Samples{},
|
|
expectedSamples: map[string]model.Samples{},
|
|
}
|
|
}
|
|
|
|
func (c *TestStorageClient) expectSamples(ss model.Samples) {
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
|
|
for _, s := range ss {
|
|
ts := s.Metric.String()
|
|
c.expectedSamples[ts] = append(c.expectedSamples[ts], s)
|
|
}
|
|
c.wg.Add(len(ss))
|
|
}
|
|
|
|
func (c *TestStorageClient) waitForExpectedSamples(t *testing.T) {
|
|
c.wg.Wait()
|
|
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
for ts, expectedSamples := range c.expectedSamples {
|
|
for i, expected := range expectedSamples {
|
|
if !expected.Equal(c.receivedSamples[ts][i]) {
|
|
t.Fatalf("%d. Expected %v, got %v", i, expected, c.receivedSamples[ts][i])
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *TestStorageClient) Store(ss model.Samples) error {
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
|
|
for _, s := range ss {
|
|
ts := s.Metric.String()
|
|
c.receivedSamples[ts] = append(c.receivedSamples[ts], s)
|
|
}
|
|
c.wg.Add(-len(ss))
|
|
return nil
|
|
}
|
|
|
|
func (c *TestStorageClient) Name() string {
|
|
return "teststorageclient"
|
|
}
|
|
|
|
func TestSampleDelivery(t *testing.T) {
|
|
// Let's create an even number of send batches so we don't run into the
|
|
// batch timeout case.
|
|
cfg := defaultConfig
|
|
n := cfg.QueueCapacity * 2
|
|
cfg.Shards = 1
|
|
|
|
samples := make(model.Samples, 0, n)
|
|
for i := 0; i < n; i++ {
|
|
name := model.LabelValue(fmt.Sprintf("test_metric_%d", i))
|
|
samples = append(samples, &model.Sample{
|
|
Metric: model.Metric{
|
|
model.MetricNameLabel: name,
|
|
},
|
|
Value: model.SampleValue(i),
|
|
})
|
|
}
|
|
|
|
c := NewTestStorageClient()
|
|
c.expectSamples(samples[:len(samples)/2])
|
|
m := NewStorageQueueManager(c, &cfg)
|
|
|
|
// These should be received by the client.
|
|
for _, s := range samples[:len(samples)/2] {
|
|
m.Append(s)
|
|
}
|
|
// These will be dropped because the queue is full.
|
|
for _, s := range samples[len(samples)/2:] {
|
|
m.Append(s)
|
|
}
|
|
m.Start()
|
|
defer m.Stop()
|
|
|
|
c.waitForExpectedSamples(t)
|
|
}
|
|
|
|
func TestSampleDeliveryOrder(t *testing.T) {
|
|
cfg := defaultConfig
|
|
ts := 10
|
|
n := cfg.MaxSamplesPerSend * ts
|
|
// Ensure we don't drop samples in this test.
|
|
cfg.QueueCapacity = n
|
|
|
|
samples := make(model.Samples, 0, n)
|
|
for i := 0; i < n; i++ {
|
|
name := model.LabelValue(fmt.Sprintf("test_metric_%d", i%ts))
|
|
samples = append(samples, &model.Sample{
|
|
Metric: model.Metric{
|
|
model.MetricNameLabel: name,
|
|
},
|
|
Value: model.SampleValue(i),
|
|
Timestamp: model.Time(i),
|
|
})
|
|
}
|
|
|
|
c := NewTestStorageClient()
|
|
c.expectSamples(samples)
|
|
m := NewStorageQueueManager(c, &cfg)
|
|
|
|
// These should be received by the client.
|
|
for _, s := range samples {
|
|
m.Append(s)
|
|
}
|
|
m.Start()
|
|
defer m.Stop()
|
|
|
|
c.waitForExpectedSamples(t)
|
|
}
|
|
|
|
// TestBlockingStorageClient is a queue_manager StorageClient which will block
|
|
// on any calls to Store(), until the `block` channel is closed, at which point
|
|
// the `numCalls` property will contain a count of how many times Store() was
|
|
// called.
|
|
type TestBlockingStorageClient struct {
|
|
numCalls uint64
|
|
block chan bool
|
|
}
|
|
|
|
func NewTestBlockedStorageClient() *TestBlockingStorageClient {
|
|
return &TestBlockingStorageClient{
|
|
block: make(chan bool),
|
|
numCalls: 0,
|
|
}
|
|
}
|
|
|
|
func (c *TestBlockingStorageClient) Store(s model.Samples) error {
|
|
atomic.AddUint64(&c.numCalls, 1)
|
|
<-c.block
|
|
return nil
|
|
}
|
|
|
|
func (c *TestBlockingStorageClient) NumCalls() uint64 {
|
|
return atomic.LoadUint64(&c.numCalls)
|
|
}
|
|
|
|
func (c *TestBlockingStorageClient) unlock() {
|
|
close(c.block)
|
|
}
|
|
|
|
func (c *TestBlockingStorageClient) Name() string {
|
|
return "testblockingstorageclient"
|
|
}
|
|
|
|
func (t *StorageQueueManager) queueLen() int {
|
|
queueLength := 0
|
|
for _, shard := range t.shards {
|
|
queueLength += len(shard)
|
|
}
|
|
return queueLength
|
|
}
|
|
|
|
func TestSpawnNotMoreThanMaxConcurrentSendsGoroutines(t *testing.T) {
|
|
// Our goal is to fully empty the queue:
|
|
// `MaxSamplesPerSend*Shards` samples should be consumed by the
|
|
// per-shard goroutines, and then another `MaxSamplesPerSend`
|
|
// should be left on the queue.
|
|
cfg := defaultConfig
|
|
n := cfg.MaxSamplesPerSend*cfg.Shards + cfg.MaxSamplesPerSend
|
|
cfg.QueueCapacity = n
|
|
|
|
samples := make(model.Samples, 0, n)
|
|
for i := 0; i < n; i++ {
|
|
name := model.LabelValue(fmt.Sprintf("test_metric_%d", i))
|
|
samples = append(samples, &model.Sample{
|
|
Metric: model.Metric{
|
|
model.MetricNameLabel: name,
|
|
},
|
|
Value: model.SampleValue(i),
|
|
})
|
|
}
|
|
|
|
c := NewTestBlockedStorageClient()
|
|
m := NewStorageQueueManager(c, &cfg)
|
|
|
|
m.Start()
|
|
|
|
defer func() {
|
|
c.unlock()
|
|
m.Stop()
|
|
}()
|
|
|
|
for _, s := range samples {
|
|
m.Append(s)
|
|
}
|
|
|
|
// Wait until the runShard() loops drain the queue. If things went right, it
|
|
// should then immediately block in sendSamples(), but, in case of error,
|
|
// it would spawn too many goroutines, and thus we'd see more calls to
|
|
// client.Store()
|
|
//
|
|
// The timed wait is maybe non-ideal, but, in order to verify that we're
|
|
// not spawning too many concurrent goroutines, we have to wait on the
|
|
// Run() loop to consume a specific number of elements from the
|
|
// queue... and it doesn't signal that in any obvious way, except by
|
|
// draining the queue. We cap the waiting at 1 second -- that should give
|
|
// plenty of time, and keeps the failure fairly quick if we're not draining
|
|
// the queue properly.
|
|
for i := 0; i < 100 && m.queueLen() > 0; i++ {
|
|
time.Sleep(10 * time.Millisecond)
|
|
}
|
|
|
|
if m.queueLen() != cfg.MaxSamplesPerSend {
|
|
t.Fatalf("Failed to drain StorageQueueManager queue, %d elements left",
|
|
m.queueLen(),
|
|
)
|
|
}
|
|
|
|
numCalls := c.NumCalls()
|
|
if numCalls != uint64(cfg.Shards) {
|
|
t.Errorf("Saw %d concurrent sends, expected %d", numCalls, cfg.Shards)
|
|
}
|
|
}
|